Edison effect bulb (1883) used as electronic tube diode at Edison Birthplace Museum. Milan, OH.

Edison effect bulb (1883) used as electronic tube diode at Edison Birthplace Museum. Milan, OH.
Photo by Jim Steinhart © 2011, all rights reserved. (Ref: OHEN165)

Click an index below to see this photo among related images:

Edison Birthplace Museum, Milan, OH
Captions List for Milan, OH

license home subjects tips